You need to watch some of the latest no holds bar matches, such as the one where Maurice Smith (a kickboxer, karate guy) knocks out at first a Kodokan judo player from Japan, then an Olympic style wrestler. NO system is perfect. Which is a better round? 45 cal or 9mm. If it knocks the threat down and out,,,"it" was the better round. It still takes the individual to aim the weapon.